people haven't changed. the incentives have changed. wen the people that understood to be moderate in the past, the fear of the primary challenge has yielded such control over the imagination of folks in washington that the reason they are so nervous of taking any position is because of the primary challenge, which is where they get punished any way that the middle voter would never punish them. it the primary voters will because of the power money yields. >> that is a trend that has developed in recent years. >> that is what i think is the incentive. >> one indication of that is there are only 21 senators and the knighted states senate that senatehe united states that are one party affiliation and their states voted for the presidential candidate of the opposing party. 79% of the senate isn't going to be willing to take a risk by incurring a primary challenge by crossing over. there is no benefit. in the public, it is true, the public feels differently. when you have $.5 billion outside advertising in these campaigns, the difference be